WO2015173781A1 - Electrical storage batteries - Google Patents

Electrical storage batteries Download PDF

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Publication number
WO2015173781A1
WO2015173781A1 PCT/IB2015/053597 IB2015053597W WO2015173781A1 WO 2015173781 A1 WO2015173781 A1 WO 2015173781A1 IB 2015053597 W IB2015053597 W IB 2015053597W WO 2015173781 A1 WO2015173781 A1 WO 2015173781A1
Authority
WO
WIPO (PCT)
Prior art keywords
grid
bridge
sections
tabs
battery
Prior art date
Application number
PCT/IB2015/053597
Other languages
French (fr)
Inventor
Jan Peterus HUMAN
Original Assignee
U Bat (Pty) Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by U Bat (Pty) Ltd filed Critical U Bat (Pty) Ltd
Publication of WO2015173781A1 publication Critical patent/WO2015173781A1/en

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/64—Carriers or collectors
    • H01M4/70—Carriers or collectors characterised by shape or form
    • H01M4/72—Grids
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/64—Carriers or collectors
    • H01M4/66—Selection of materials
    • H01M4/661—Metal or alloys, e.g. alloy coatings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/06—Lead-acid accumulators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/34—Gastight accumulators
    • H01M10/345—Gastight metal hydride accumulators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/64—Carriers or collectors
    • H01M4/66—Selection of materials
    • H01M4/68—Selection of materials for use in lead-acid accumulators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/64—Carriers or collectors
    • H01M4/70—Carriers or collectors characterised by shape or form
    • H01M4/72—Grids
    • H01M4/73—Grids for lead-acid accumulators, e.g. frame plates
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/409—Separators, membranes or diaphragms characterised by the material
    • H01M50/411—Organic material
    • H01M50/429—Natural polymers
    • H01M50/4295—Natural cotton, cellulose or wood
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/409—Separators, membranes or diaphragms characterised by the material
    • H01M50/44—Fibrous material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/463—Separators, membranes or diaphragms characterised by their shape
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • This invention relates to electrical storage batteries.
  • the present invention provided a battery, and components thereof, which can be charged using some of the power being generated by solar and wind generators whilst the remainder of the power simultaneously being used for purposes such as lighting and heating.
  • a battery grid of electrically conductive metal having first and second tabs spaced apart along an edge thereof, there being a gap in the grid extending from said edge towards an opposed edge of the grid and subdividing the grid into two grid sections, the gap terminating short of said opposed edge and there being an electrically conductive bridge spanning between said grid sections so that said tabs are electrically connected to one another through said sections and said bridge.
  • Said grid can comprise a single piece of metal, said bridge being integral with said grid sections.
  • said grid sections can be separate components which are joined to one another by a bridge element which is secured to said separate components.
  • the grid sections in this form can be of different metals.
  • the grid is rectangular in shape with the slot extending from one edge and across the grid, terminating close to the opposed edge.
  • In another from the grid can be in the form of two elongate metal strips with a gap, which extends in the direction of the length of the strips, between them, said bridge joining an end of one strip to the adjacent end of the other strip.
  • first and second grids each grid being as described above, wherein the first grid is pasted with electrochemically positive material and the second grid is pasted with electrochemically negative material to form positive and negative plates, there being a separator and electrolyte between the plates thereby to constitute a cell.
  • a method of operating the cell described in the preceding paragraph which comprises overcharging the cell so that hydrogen is evolved on the negative plate and oxygen is evolved on the positive plate.
  • a power generating and power consuming installation comprising a cell as defined above, a source of electrical power connected between one of the tabs of the positive plate and one of the tabs of the negative plate and a power consuming device connected across the other tab of the positive plate and other tab of the negative plate, positive terminals of the power source and of the power consuming device being connected to one another through the bridge of the positive plate, and the negative terminals of the power source and of the power consuming device being connected to one another through the bridge of the negative plate.
  • Figure 1 is a pictorial view of a battery grid
  • Figure 2 is a pictorial view of an electrochemical cell comprising two pasted grids
  • Figure 3 is a pictorial view of two electrochemical cells electrically connected to constitute a battery
  • Figure 4 is a pictorial view of a further form of electrochemical cell
  • Figure 5 is a diagrammatic representation of a battery of cylindrical form
  • FIG. 6 is a detail of the battery of Figure 5.
  • the battery grid shown in Figure 1 is designated 10 and comprises a sheet of electrically conductive metal which is rolled, punched or cast to the illustrated configuration.
  • the grid is generally rectangular having an upper edge 12 from which two tabs 14 and 16 protrude.
  • the grid is formed with a plurality of openings 18 which receive electrochemically positive paste or electrochemically negative paste.
  • An elongate slot 20 is formed in the grid, the slot 20 extending from the edge 12 towards the opposed parallel edge 22.
  • the slot 20 terminates short of the edge 22 thereby giving rise to a bridge 24 which electrically connects a first grid section, designated 26, to a second grid section generally designated 28.
  • the electrically conductive metal can be lead, nickel, lithium, copper or alloys of these.
  • the sections 26, 28 can, in an alternative form, be constituted by separate components of electrically conductive metal.
  • the components can be of the same metal or of metals of different electrical conductivity. In this form the components are connected to one another by an electrically conductive strip which constitutes the bridge between the two grid components.
  • the grid is pasted with electrochemically active material to provide a battery of the lead / acid, lithium / ion or nickel / metal hydride type or a battery of any other desired form.
  • electrochemically active material to provide a battery of the lead / acid, lithium / ion or nickel / metal hydride type or a battery of any other desired form.
  • a grid 10.1 which is pasted with electrochemically negative material is placed against a grid 10.2 which is pasted with electrochemically positive material, there being a porous separator 30 between the grids.
  • the separator 30 is shown as having an array of horizontally separated vertically extending ribs 32 thereby to provide inter-grid spaces for receiving liquid electrolyte.
  • the separator can be constituted by a material such as tissue paper which is impregnated with electrolyte gel. This enables a thinner cell to be constructed.
  • the grids have been designated 10.1 and 10.2, the grid 10.1 being the grid carrying the electrochemically negative material.
  • the tabs of the grids have been designated 14.1 , 14.2, 16.1 and 16.2 and the grid sections have been designated 26.1 , 26.2, 28.1 and 28.2.
  • the visible bridge is designated 24.1.
  • a source of DC electrical current is connected across the tabs 16.1 , 16.2.
  • the tab 16.1 is connected to the negative of the source of charging current and the tab 16.2 to the positive of the source of charging current.
  • the power consuming device is connected across the tabs 14.1 , 14.2, the tab 14.1 being the negative terminal of the power consuming device and the tab 14.2 being the positive terminal of the power consuming device.
  • the tabs 14.1 , 14.2 are consequently the discharging tabs and the tabs 16.1 , 16.2 are the charging tabs.
  • the greater part of the stream of electrons from the power source flows from the source of current through the tab 16.1 , through the grid section 26.1 , the bridge 24.1 and the grid section 28.1 to the tab 14.1 . From the tab 14.1 the electron flow is through the power consuming device to the tab 14.2, through the grid section 28.2, the bridge of the grid 10.2 (not visible in Figure 2), the grid section 26.2 and the tab 16.2 and thus to the positive side of the power source.
  • Figure 3 illustrates two cells of the form described above connected in series to form a battery.
  • the tab construction generally designated 32 connects the cells in series thereby doubling the nomal voltage from, say, 2 V to 4 V.
  • the tabs 34 can be used if it is desired to obtain an output from the battery that is less than the full voltage available across the battery. It will be understood that six cells can be connected in series to provide a battery with a normal output voltage of 12 V.
  • each cell comprises a negative battery plate on each side of a positive battery plate with separators between the plates.
  • the cells are shown standing side-by-side as they do in a standard lead acid battery. It is, however, possible to arrange the cells in a layflat form with the tabs of one cell projecting towards the tabs of the other cell. The cells are appropriately connected in series. In this layflat form a tab arrangement such as that shown in Figure 4 can be employed to facilitate cell-to-cell connection.
  • the grids can be of substantial dimensions, measured in terms of one or two meters in height and the same in length. Batteries constructed using such grids provide a significant number of ampere hours of storage capacity.
  • An inverter can be connected across the output tabs 14.1 , 14.2, so as to provide single phase, two phase or three phase AC. The output of the inverter can be fed to the electrical grid.
  • FIG. 5 this illustrates a cylindrical battery designated 36.
  • the strips constituting the battery, before it is rolled, comprise elongate outer separators 38 and 40 and two parallel elongate metal grids 42 and 44.
  • Each grid 42, 44 is subdivided, by longitudinally extending designated gap 46, 48, into grid sections designated 42.1 , 42.2 and 44.1 , 44.2.
  • the grids are pasted, the paste of the grid 42 being designated 50 and the paste of the grid 44 being designated 52.
  • Tabs 56, 58, 60 and 62 are attached to the grid sections 42.1 , 42.2, 44.1 and 44.2 respectively.
  • a bridge designated 64 At the end of each grid 42, 44 remote from the tabs thereof there is a bridge designated 64. This is shown in Figure 6.
  • the bridge 64 can be integral with the grids or constituted by a separate component.

Abstract

The disclosed battery grid (10) is of electrically conductive metal. The grid has first and second tabs (14, 16) spaced apart along an edge (12) thereof. A gap (20) in the grid extends from the edge from which the tabs protrude towards an opposed edge (22) of the grid and subdivides the grid into two grid sections (26, 28). The gap terminates short of the opposed edge of the grid and there is an electrically conductive bridge (24) spanning between the grid sections so that the tabs are electrically connected to one another through the sections and the bridge. The grid can be a flat plate or a rolled, elongate strip.

Description

ELECTRICAL STORAGE BATTERIES
FIELD OF THE INVENTION This invention relates to electrical storage batteries.
BACKGROUND TO THE INVENTION
Problems in the electrical supply industry which still remain to be solved revolve around mankind's ability to use electricity economically. Much attention is being given to alternative forms of generation such as wind power and solar power. The power generated is mostly used immediately for purposes such as water heating and lighting. When these sources of power are not available, at night or when the wind drops, the user must resort to the mains supply which is usually derived from coal fired or nuclear plants.
The present invention provided a battery, and components thereof, which can be charged using some of the power being generated by solar and wind generators whilst the remainder of the power simultaneously being used for purposes such as lighting and heating.
BRIEF DESCRIPTION OF THE INVENTION
According to one aspect of the present invention there is provided a battery grid of electrically conductive metal, the grid having first and second tabs spaced apart along an edge thereof, there being a gap in the grid extending from said edge towards an opposed edge of the grid and subdividing the grid into two grid sections, the gap terminating short of said opposed edge and there being an electrically conductive bridge spanning between said grid sections so that said tabs are electrically connected to one another through said sections and said bridge.
Said grid can comprise a single piece of metal, said bridge being integral with said grid sections.
Alternatively said grid sections can be separate components which are joined to one another by a bridge element which is secured to said separate components. The grid sections in this form can be of different metals.
In one form the grid is rectangular in shape with the slot extending from one edge and across the grid, terminating close to the opposed edge.
In another from the grid can be in the form of two elongate metal strips with a gap, which extends in the direction of the length of the strips, between them, said bridge joining an end of one strip to the adjacent end of the other strip.
According to another aspect of the present invention there is provided, in combination, first and second grids, each grid being as described above, wherein the first grid is pasted with electrochemically positive material and the second grid is pasted with electrochemically negative material to form positive and negative plates, there being a separator and electrolyte between the plates thereby to constitute a cell.
According to a further aspect of the present invention there is provided a method of operating the cell described in the preceding paragraph which comprises overcharging the cell so that hydrogen is evolved on the negative plate and oxygen is evolved on the positive plate. According to a still further aspect of the present invention there is provided a power generating and power consuming installation comprising a cell as defined above, a source of electrical power connected between one of the tabs of the positive plate and one of the tabs of the negative plate and a power consuming device connected across the other tab of the positive plate and other tab of the negative plate, positive terminals of the power source and of the power consuming device being connected to one another through the bridge of the positive plate, and the negative terminals of the power source and of the power consuming device being connected to one another through the bridge of the negative plate.
BRIEF DESCRIPTION OF THE DRAWINGS
For a better understanding of the present invention, and to show how the same may be carried into effect, reference will now be made, by way of example, to the accompanying drawings in which,
Figure 1 is a pictorial view of a battery grid;
Figure 2 is a pictorial view of an electrochemical cell comprising two pasted grids;
Figure 3 is a pictorial view of two electrochemical cells electrically connected to constitute a battery;
Figure 4 is a pictorial view of a further form of electrochemical cell;
Figure 5 is a diagrammatic representation of a battery of cylindrical form; and
Figure 6 is a detail of the battery of Figure 5. DETAILED DESCRIPTION OF THE DRAWINGS
The battery grid shown in Figure 1 is designated 10 and comprises a sheet of electrically conductive metal which is rolled, punched or cast to the illustrated configuration. The grid is generally rectangular having an upper edge 12 from which two tabs 14 and 16 protrude. The grid is formed with a plurality of openings 18 which receive electrochemically positive paste or electrochemically negative paste. An elongate slot 20 is formed in the grid, the slot 20 extending from the edge 12 towards the opposed parallel edge 22. The slot 20 terminates short of the edge 22 thereby giving rise to a bridge 24 which electrically connects a first grid section, designated 26, to a second grid section generally designated 28. The electrically conductive metal can be lead, nickel, lithium, copper or alloys of these. To protect the metal of the grids they can be covered by an electrically conductive, acid resistant polymer. The sections 26, 28 can, in an alternative form, be constituted by separate components of electrically conductive metal. The components can be of the same metal or of metals of different electrical conductivity. In this form the components are connected to one another by an electrically conductive strip which constitutes the bridge between the two grid components.
The grid is pasted with electrochemically active material to provide a battery of the lead / acid, lithium / ion or nickel / metal hydride type or a battery of any other desired form. To form a cell as shown in Figure 2, a grid 10.1 which is pasted with electrochemically negative material is placed against a grid 10.2 which is pasted with electrochemically positive material, there being a porous separator 30 between the grids.
In the illustrated form of Figure 2, the separator 30 is shown as having an array of horizontally separated vertically extending ribs 32 thereby to provide inter-grid spaces for receiving liquid electrolyte. However, if desired the separator can be constituted by a material such as tissue paper which is impregnated with electrolyte gel. This enables a thinner cell to be constructed.
In Figure 2 the grids have been designated 10.1 and 10.2, the grid 10.1 being the grid carrying the electrochemically negative material. The tabs of the grids have been designated 14.1 , 14.2, 16.1 and 16.2 and the grid sections have been designated 26.1 , 26.2, 28.1 and 28.2. The visible bridge is designated 24.1. A source of DC electrical current is connected across the tabs 16.1 , 16.2. The tab 16.1 is connected to the negative of the source of charging current and the tab 16.2 to the positive of the source of charging current. The power consuming device is connected across the tabs 14.1 , 14.2, the tab 14.1 being the negative terminal of the power consuming device and the tab 14.2 being the positive terminal of the power consuming device. The tabs 14.1 , 14.2 are consequently the discharging tabs and the tabs 16.1 , 16.2 are the charging tabs.
The greater part of the stream of electrons from the power source flows from the source of current through the tab 16.1 , through the grid section 26.1 , the bridge 24.1 and the grid section 28.1 to the tab 14.1 . From the tab 14.1 the electron flow is through the power consuming device to the tab 14.2, through the grid section 28.2, the bridge of the grid 10.2 (not visible in Figure 2), the grid section 26.2 and the tab 16.2 and thus to the positive side of the power source.
Some portion of the electron flow is through the paste of the grid 10.1 , the electrolyte and the paste of the grid 10.2. This portion of the current constitutes a charging current for the cell. It will be understood that, as a consequence, provided the charging current exceeds the current which is being used in the power consuming device, there is a residual current available for the purpose of charging the cell whilst the power is being consumed. In the event that the charging current ceases to flow, the cell commences to discharge through the power consuming device.
Figure 3 illustrates two cells of the form described above connected in series to form a battery. The tab construction generally designated 32 connects the cells in series thereby doubling the nomal voltage from, say, 2 V to 4 V. The tabs 34 can be used if it is desired to obtain an output from the battery that is less than the full voltage available across the battery. It will be understood that six cells can be connected in series to provide a battery with a normal output voltage of 12 V.
In conventional manner each cell comprises a negative battery plate on each side of a positive battery plate with separators between the plates.
In Figure 3 the cells are shown standing side-by-side as they do in a standard lead acid battery. It is, however, possible to arrange the cells in a layflat form with the tabs of one cell projecting towards the tabs of the other cell. The cells are appropriately connected in series. In this layflat form a tab arrangement such as that shown in Figure 4 can be employed to facilitate cell-to-cell connection.
The grids can be of substantial dimensions, measured in terms of one or two meters in height and the same in length. Batteries constructed using such grids provide a significant number of ampere hours of storage capacity. An inverter can be connected across the output tabs 14.1 , 14.2, so as to provide single phase, two phase or three phase AC. The output of the inverter can be fed to the electrical grid.
Turning now to Figure 5, this illustrates a cylindrical battery designated 36. The strips constituting the battery, before it is rolled, comprise elongate outer separators 38 and 40 and two parallel elongate metal grids 42 and 44. Each grid 42, 44 is subdivided, by longitudinally extending designated gap 46, 48, into grid sections designated 42.1 , 42.2 and 44.1 , 44.2.
The grids are pasted, the paste of the grid 42 being designated 50 and the paste of the grid 44 being designated 52. A further separator 54 of, for example, tissue paper soaked in electrolyte gel, is provided between the pasted grids 42, 50 and 44, 52.
Tabs 56, 58, 60 and 62 are attached to the grid sections 42.1 , 42.2, 44.1 and 44.2 respectively. At the end of each grid 42, 44 remote from the tabs thereof there is a bridge designated 64. This is shown in Figure 6. The bridge 64 can be integral with the grids or constituted by a separate component.

Claims

A battery grid of electrically conductive metal, the grid having first and second tabs spaced apart along an edge thereof, there being a gap in the grid extending from said edge towards an opposed edge of the grid and subdividing the grid into two grid sections, the gap terminating short of said opposed edge and there being an electrically conductive bridge spanning between said grid sections so that said tabs are electrically connected to one another through said sections and said bridge.
A battery grid as claimed in claim 1 and which comprises a single piece of metal, said bridge being integral with said grid sections.
A battery grid as claimed in claim 1 , wherein said grid sections are separate components which are joined to one another by a bridge element which is secured to said separate components.
A battery grid as claimed in claim 3, wherein the grid sections are of different metals.
A battery grid as claimed in any preceding claim in which the grid is rectangular in shape with the slot extending from one edge and across the grid, terminating close to the opposed edge.
A battery grid as claimed in any one of claims 1 to 4, wherein the grid is in the form of two elongate metal strips with a gap, which extends in the direction of the length of the strips, between them, said bridge joining an end of one strip to the adjacent end of the other strip.
7. In combination, first and second grids, each grid being as claimed in any preceding claim, wherein the first grid is pasted with electrochemically positive material and the second grid is pasted with electrochemically negative material to form positive and negative plates, there being a separator and electrolyte between the plates thereby to constitute a cell.
8. A method of operating the combination of claim 7 which comprises overcharging the cell so that hydrogen is evolved on the negative plate and oxygen is evolved on the positive plate.
9. A power generating and power consuming installation comprising a cell as claimed in claim 7, a source of electrical power connected between one of the tabs of the positive plate and one of the tabs of the negative plate and a power consuming device connected across the other tab of the positive plate and the other tab of the negative plate, positive terminals of the power source and of the power consuming device being connected to one another through the bridge of the positive plate, and the negative terminals of the power source and of the power consuming device being connected to one another through the bridge of the negative plate.
PCT/IB2015/053597 2014-05-16 2015-05-15 Electrical storage batteries WO2015173781A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA2014/02785 2014-05-16
ZA201402785 2014-05-16

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108336296A (en) * 2017-12-28 2018-07-27 广州倬粤动力新能源有限公司 Pole plate anticreep herbal paste method
WO2021218139A1 (en) * 2020-04-30 2021-11-04 浙江天能电池(江苏)有限公司 Continuous casting plate grid mesh belt structure

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3516864A (en) * 1967-11-20 1970-06-23 Gen Motors Corp Battery grid and terminal therefor
US4151331A (en) * 1978-02-23 1979-04-24 The Gates Rubber Company Offset perforated lead-acid battery grid
EP0076626A1 (en) * 1981-10-01 1983-04-13 Matsushita Electric Industrial Co., Ltd. Grid for lead storage battery and method for its production

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3516864A (en) * 1967-11-20 1970-06-23 Gen Motors Corp Battery grid and terminal therefor
US4151331A (en) * 1978-02-23 1979-04-24 The Gates Rubber Company Offset perforated lead-acid battery grid
EP0076626A1 (en) * 1981-10-01 1983-04-13 Matsushita Electric Industrial Co., Ltd. Grid for lead storage battery and method for its production

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108336296A (en) * 2017-12-28 2018-07-27 广州倬粤动力新能源有限公司 Pole plate anticreep herbal paste method
WO2021218139A1 (en) * 2020-04-30 2021-11-04 浙江天能电池(江苏)有限公司 Continuous casting plate grid mesh belt structure

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